Calculate $\mathbb{E}\tau$

Question

Let $X = (X_t)_{t\geq 0}$ be a non-negative stochastic process such that \begin{equation} dX_t = 7dt + 2\sqrt{X_t}dB_t, \quad X_0 = 0 \end{equation} with $B= (B_t)_{t\geq 0}$ a standard Brownian motion. Now let $\tau = \inf\{t\geq 0: X_t = |5-4t|\}$. I want to calculate $\mathbb{E}\tau$, but I do not know how to manage the modulus. Any hint, please?